Stopwatch Snippet Variable
This idea comes from our user Ross:
"A snippet which would add a time stamp in seconds with a running clock restarted from 0 seconds from the previous marker. The first marker would start the clock running and the second entry would add the elapsed time, say 10.35 (seconds). The third entry would reset the clock to zero then add the elapsed time between the second and third entry, say 120.50 (seconds)."